1. The epidemiological diagnosis of ankylosing spondylitis. Population Studies of the Rheumatic Diseases;Bennett, P.H.; Burch, T.A.;International Congress Series; Excerpta Medica, Amsterdam.,1968
2. Report of the subcommittee on diagnostic criteria for ankylosing spondylitis. Population Studies of the Rheumatic Diseases;Gofton, J.P.;International Congress Series; Excerpta Medica, Amsterdam.,1968
3. The scintigraphic investigation of sacroiliac disease;Lentle, B.C.; Russell, A.S.; Percy, J.S.; Jackson, F.I.;Journal of Nuclear Medicine,1977
4. Measurement of back movement;Macrae, I.F.; Wright, V.;Annals of the Rheumatic Diseases,1969
5. Bone scanning;Merrick, M.V.;British Journal of Radiology,1975